Improved road-scraper



tait-a aan i se? @with JAMES W. lIVICYDONALD, O'F CHICAGO, ILLINO IS.

Letters Patent No. 86,431, dated February l2, 1869.

-IIMPROVIED ROAD-SCRAPER.

The Schedule referred to' in these Letters Patent and making part ofvthe same l --19 v To all' whom, it may concern:

Be it known that I, JAMESv W. McDonALm of the city of Chicago, in the county of Cook, and State of Illinois, have invented certain new and useful Improvements in Scrapers; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents `a top or plan view;

Figure 2, a side view of the delivery-side;

Figure 3, a View of the opposite Aside; and p Figure 4, a vertical section of the scraper-board and attachment.

Like letters refer to the same partslinall ofthe figures.

The nature of my invention consists in making a scraper, tobe used by horse or other power adjustablel in the angle of the scraper-board, and in the sidedraught; in placing it on or attaching it to guide-runners, in a novel Amode of attaching the scraper proper to the board; and in the several combinations hereinafter Aset forth and claimed as new.

To enable others skilled in the art to'make and use my invention, I will proceed' to describe its construction and operation.

I make a trame-work, consisting of two runners, B and P, braced or tied together by the beams or crosspieces D.

The runner P, I usually make three feet long, and the runner B, two feet long, and place them three feet apart.

To the rear end of this, trame-Work, I attach' two handles, C, which may be made like ordinary plowhandles, as shown, and braced by the rods E' To this frame I also attach a beam, A, by means of the post N and one of the handles, C.

This beam extends some distance forward of the frame B P D. Phe exact distance is not material; two and one-half feet will be suiiicient.

An ordinary clevis, M, is attached to the front end, and just back of such cleris M, I attach a guide-wheel, L, by the pendants K. l

I usually make the wheel L sharp-edged, so that it will hold better on a pavement, and assist in keeping` the machinesteady.

The runner P extends forward of B sutliciently far to gire an angle of about forty degrees, with the beam D, and on the side I atta-ch a slide, O, whichis iitted into grooves or slides e, (see lig. 3,) and is held in place by the set-screw d, and made adjustable in the grooves e by means ofthe slot c.

To'the front end of this slide O, and to the front end of runner B, the bar or beam Gis hinged by the hinges i 'I and J.

In the form of hinges shown, small triangular blocks j and 7c are interposed between the hinges and beam or bar G, in order to give such beam a vertical in! scraper-board, as shown by the blue lines, and thereby Y change the position of the scraper-board without binding on the hinges.

The vertical and longitudinal angles are adjusted by this beam, and the scraper-board F rests flat against it, and is attached thereto or supported by the projection or attachment H, which is on the back of such board, and is provided with a tongue or slide itting into groove Z, and which holds the scraper-board in place vertically.

At the lower edge of the scraper-board F, I screw on or otherwise attach a rabbeted piece, 11. This piece or strip of board is cut away, so as to form a groove, in connection with board F, for the insertion of a scraper-edge, a, and not so far cut away but that, when screwed down, it will clamp and hold the scraping-edge a in place. v

The upper edge of b tits into and rests against the lower projection of the beam ory bar G, as shown at figs. 3 and 4.

For scraping dirt or mud, I use rubber for the scraping-edge, which is prepared with cloth or otherwise, in the usual manner. For scraping earth or snow, I insert a steel scraping-edge, so that it can b-e used for scraping and cleaning either paved or unpaved streets, roads, and for other purposes, where such scraper can be used; and, if desired,'wood can be inserted.`

When scraping the full width of the scraper, the board F, which is further secured to Gr by'a set-screw, j', passing through the slot c into G, is placed out, as shown by the red lines, and' when not scraping full width, the board is left indicated by the black lines. It is adjustable by means of the described slot c and screw j, so that it can be set at any desired position within the limits of the slot, so to balance the draught with the cut of the machine.

By using runners with the wheel in front, the machine is kept steady in its movements, as they act as guides, and prevent the maehineliom turning, although cutting or scraping at an angle.

I have found, by experiment, that in all places, except light scraping, an angle of forty degrees is best, and the scraping-board is made to rest against the frame-work at this angle, but for light scraping, the' slide O may be pushed forward and increase the angle,

as shown by the blue lines, when it will discharge the dirt at the side with more rapidity, and the machine can be used full width.

Its operation will be apparent from the description.

Having thus fully described my machine,

What I claim asnew, and ,desire to secure by Let- 1. The scraper-board F, when provided with a lateral or side adjustment and a suitable stop or fastening, substantially as and for the purposes specied. 2. The sectional beanior back-support G, in comv bination with the board F, when connected and operating substantially-as specified.

' 3. The combination and arrangement of ,the adjustable 'bar or slide O, beam or supporting-bar G, and

joints or hinges I and J, with the .runners P and B, for adj usting the angle of the board F, sulistantially as specified. f

4. The combination and arrangement ofthe runner P, proyided with aslide, O, runner B, beams D, handles C, beam A, and wheel L, with the board F and beam G, substantiallyas and for the purposes speci-V Y 

